Aleto Thomas J, Berend Michael E, Ritter Merrill A, Faris Philip M, Meneghini R Michael
The Center for Hip and Knee Surgery, Joint Replacement Surgeons of Indiana Research Foundation, St. Francis Hospital, Mooresville, Indiana 46158, USA.
J Arthroplasty. 2008 Feb;23(2):159-63. doi: 10.1016/j.arth.2007.03.020.
The most common previously reported modes of failure of unicompartmental knee arthroplasty (UKA) in the first and second decades are polyethylene wear, progression of arthritis, and component loosening. The purpose of this study is to describe an early mechanism of failure of the medial UKA. Thirty-two consecutive revisions from UKA to total knee arthroplasty were retrospectively reviewed. The predominant mode of failure observed in 15 (47%) of 32 knees was medial tibial collapse. Of these, 87% were an all-polyethylene design, and 7 of 15 failed in less than 16 months and required more complex reconstruction with stems, augments, and screws and cement. Increased tibial slope was associated with posterior tibial collapse. In our series, knees that failed by medial tibial collapse had more significant bone defects and required more complex reconstructions than is currently reported in the literature.
先前报道的单髁膝关节置换术（UKA）在最初十年和第二个十年中最常见的失败模式是聚乙烯磨损、关节炎进展和假体松动。本研究的目的是描述内侧UKA早期失败机制。对32例连续从UKA翻修为全膝关节置换术的病例进行回顾性分析。32例膝关节中有15例（47%）观察到的主要失败模式是内侧胫骨塌陷。其中，87%为全聚乙烯设计，15例中有7例在不到16个月内失败，需要使用柄、增强物、螺钉和骨水泥进行更复杂的重建。胫骨坡度增加与胫骨后内侧塌陷有关。在我们的系列研究中，因内侧胫骨塌陷而失败的膝关节有更严重的骨缺损，并且需要比目前文献报道更复杂的重建。
